The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Dimitris Plexousakis - One of the best experts on this subject based on the ideXlab platform.
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requirements for qos based web Service Description and discovery
IEEE Transactions on Services Computing, 2009Co-Authors: Kyriakos Kritikos, Dimitris PlexousakisAbstract:The goal of Service oriented architectures (SOAs) is to enable the creation of business applications through the automatic discovery and composition of independently developed and deployed (Web) Services. Automatic discovery of Web Services (WSs) can be achieved by incorporating semantics into a richer WS Description model (WSDM) and by the use of semantic Web (SW) technologies in the WS matchmaking and selection (i.e., discovery) process. A sufficiently rich WSDM should encompass not only functional but also nonfunctional aspects like quality of Service (QoS). QoS is a set of performance and domain-dependent attributes that has a substantial impact on WS requesters' expectations. Thus, it can be used for distinguishing between many functionally equivalent WSs that are available nowadays. This paper starts by defining QoS in the context of WSs. Its main contribution is the analysis of the requirements for a semantically rich QoS-based WSDM and an accurate, effective QoS-based WS Discovery (WSDi) process. In addition, a road map of extending current WS standard technologies for realizing semantic, functional, and QoS-based WSDi, respecting the above requirements, is presented.
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owl q for semantic qos based web Service Description and discovery
SMRR'07 Proceedings of the 2007 International Conference on Service Matchmaking and Resource Retrieval in the Semantic Web - Volume 243, 2007Co-Authors: Kyriakos Kritikos, Dimitris PlexousakisAbstract:Semantic Web Services are emerging for their promise to produce a more accurate and precise Web Service discovery process. However, most of research approaches focus only on the functional part of semantic Web Service Description. The above fact along with the proliferation of Web Services is highly probable to lead to a situation where Web Service registries will return many functionally-equivalent Web Service advertisements for each user request. This problem can be solved with the semantic Description of QoS for Web Services. QoS is a set of non-functional properties encompassing performance and network-related characteristics of resources. So it can be used for distinguishing between functionally-equivalent Web Services. Current research approaches for QoS-based Web Service Description are either syntactic or poor or non-extensible. To solve this problem, we have developed a rich and extensible ontological specification called OWL-Q for semantic QoS-based Web Service Description. We analyze all OWL-Q parts and reason that rules should be added in order to support property inferencing and constraint enforcement. Finally, we line out our under-development semantic framework for QoS-based Web Service Description and discovery.
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requirements for qos based web Service Description and discovery
Computer Software and Applications Conference, 2007Co-Authors: Kyriakos Kritikos, Dimitris PlexousakisAbstract:The goal of Service oriented architectures is to enable the creation of business applications through the automatic discovery and composition of independently developed and deployed (Web) Services. Automatic discovery of Web Services (WSs) can be achieved by incorporating semantics into a richer WS Description model (WSDM) and the use of Semantic Web (SW) technologies in the WS matchmaking and selection models. A sufficiently rich WSDM should encompass not only functional but also non-functional aspects like Quality of Service (QoS). QoS is a set of performance attributes that has a substantial impact on WS requesters' expectations. Thus, it can be used as a discriminating factor of functionally-equivalent WSs. The focus of this paper is twofold: to analyze the requirements of a semantically rich QoS-based WSDM and to provide SW and constrained- based mechanisms for enriching syntactic QoS-based WS Discovery (WSDi) algorithms. In addition, a roadmap of extending WS standard techniques for realizing semantic, functional and QoS-based WSDi is presented.
Kyriakos Kritikos - One of the best experts on this subject based on the ideXlab platform.
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requirements for qos based web Service Description and discovery
IEEE Transactions on Services Computing, 2009Co-Authors: Kyriakos Kritikos, Dimitris PlexousakisAbstract:The goal of Service oriented architectures (SOAs) is to enable the creation of business applications through the automatic discovery and composition of independently developed and deployed (Web) Services. Automatic discovery of Web Services (WSs) can be achieved by incorporating semantics into a richer WS Description model (WSDM) and by the use of semantic Web (SW) technologies in the WS matchmaking and selection (i.e., discovery) process. A sufficiently rich WSDM should encompass not only functional but also nonfunctional aspects like quality of Service (QoS). QoS is a set of performance and domain-dependent attributes that has a substantial impact on WS requesters' expectations. Thus, it can be used for distinguishing between many functionally equivalent WSs that are available nowadays. This paper starts by defining QoS in the context of WSs. Its main contribution is the analysis of the requirements for a semantically rich QoS-based WSDM and an accurate, effective QoS-based WS Discovery (WSDi) process. In addition, a road map of extending current WS standard technologies for realizing semantic, functional, and QoS-based WSDi, respecting the above requirements, is presented.
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owl q for semantic qos based web Service Description and discovery
SMRR'07 Proceedings of the 2007 International Conference on Service Matchmaking and Resource Retrieval in the Semantic Web - Volume 243, 2007Co-Authors: Kyriakos Kritikos, Dimitris PlexousakisAbstract:Semantic Web Services are emerging for their promise to produce a more accurate and precise Web Service discovery process. However, most of research approaches focus only on the functional part of semantic Web Service Description. The above fact along with the proliferation of Web Services is highly probable to lead to a situation where Web Service registries will return many functionally-equivalent Web Service advertisements for each user request. This problem can be solved with the semantic Description of QoS for Web Services. QoS is a set of non-functional properties encompassing performance and network-related characteristics of resources. So it can be used for distinguishing between functionally-equivalent Web Services. Current research approaches for QoS-based Web Service Description are either syntactic or poor or non-extensible. To solve this problem, we have developed a rich and extensible ontological specification called OWL-Q for semantic QoS-based Web Service Description. We analyze all OWL-Q parts and reason that rules should be added in order to support property inferencing and constraint enforcement. Finally, we line out our under-development semantic framework for QoS-based Web Service Description and discovery.
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requirements for qos based web Service Description and discovery
Computer Software and Applications Conference, 2007Co-Authors: Kyriakos Kritikos, Dimitris PlexousakisAbstract:The goal of Service oriented architectures is to enable the creation of business applications through the automatic discovery and composition of independently developed and deployed (Web) Services. Automatic discovery of Web Services (WSs) can be achieved by incorporating semantics into a richer WS Description model (WSDM) and the use of Semantic Web (SW) technologies in the WS matchmaking and selection models. A sufficiently rich WSDM should encompass not only functional but also non-functional aspects like Quality of Service (QoS). QoS is a set of performance attributes that has a substantial impact on WS requesters' expectations. Thus, it can be used as a discriminating factor of functionally-equivalent WSs. The focus of this paper is twofold: to analyze the requirements of a semantically rich QoS-based WSDM and to provide SW and constrained- based mechanisms for enriching syntactic QoS-based WS Discovery (WSDi) algorithms. In addition, a roadmap of extending WS standard techniques for realizing semantic, functional and QoS-based WSDi is presented.
Katia P. Sycara - One of the best experts on this subject based on the ideXlab platform.
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semantic matching of web Services capabilities
International Semantic Web Conference, 2002Co-Authors: Massimo Paolucci, Terry R Payne, Takahiro Kawamura, Katia P. SycaraAbstract:The Web is moving from being a collection of pages toward a collection of Services that interoperate through the Internet. The first step toward this interoperation is the location of other Services that can help toward the solution of a problem. In this paper we claim that location of web Services should be based on the semantic match between a declarative Description of the Service being sought, and a Description of the Service being offered. Furthermore, we claim that this match is outside the representation capabilities of registries such as UDDI and languages such as WSDL.We propose a solution based on DAML-S, a DAML-based language for Service Description, and we show how Service capabilities are presented in the Profile section of a DAML-S Description and how a semantic match between advertisements and requests is performed.
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daml s web Service Description for the semantic web
International Semantic Web Conference, 2002Co-Authors: Mark H. Burstein, Ora R A Lassila, Sheila A. Mcilraith, Drew V. Mcdermott, Srini Narayanan, Massimo Paolucci, David L. Martin, Terry R Payne, Jerry R. Hobbs, Katia P. SycaraAbstract:In this paper we present DAML-S, a DAML+OIL ontology for describing the properties and capabilities of Web Services. Web Services - Web-accessible programs and devices - are garnering a great deal of interest from industry, and standards are emerging for low-level Descriptions of Web Services. DAML-S complements this effort by providing Web Service Descriptions at the application layer, describing what a Service can do, and not just how it does it. In this paper we describe three aspects of our ontology: the Service profile, the process model, and the Service grounding. The paper focuses on the grounding, which connects our ontology with low-level XML-based Descriptions of Web Services.
Ellen Munthekaas - One of the best experts on this subject based on the ideXlab platform.
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a conceptual Service discovery architecture for semantic web Services in dynamic environments
International Conference on Data Engineering, 2006Co-Authors: T Gagnes, Thomas Plagemann, Ellen MunthekaasAbstract:Web Services technology is being used for increasingly different environments than it was designed for. To facilitate discovery of Web Services in dynamic environments, both Service Description and distribution of Descriptions must be improved. Several research efforts target semantic Description of Services. However, Semantic Web Service discovery in peer-to-peer-like, dynamic environments where Services and registries are transient cannot be based on current mechanisms for distribution of Web Service Descriptions. Based on a set of generic requirements, we introduce a conceptual architecture that aims to solve many of the problems related to Semantic Web Service discovery in dynamic environments. The architecture is based on a distributed multi-registry topology and aliveness information. We present several research problems we have identified during our initial work on this architecture.
Jinghai Rao - One of the best experts on this subject based on the ideXlab platform.
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Logic-based Web Services composition: from Service Description to process model
Proceedings. IEEE International Conference on Web Services 2004., 2004Co-Authors: Jinghai Rao, K PeepAbstract:This paper introduces a method for automatic composition of Semantic Web Services using Linear Logic (LL) theorem proving. The method uses Semantic Web Service language (DAML-S) for external presentation of Web Services, while, internally, the Services are presented by extralogical axioms and proofs in LL. We use a process calculus to present the composite Service formally. The process calculus is attached to the LL inference rules in the style of type theory. Thus the process model for a composite Service can be generated directly from the proof. The subtyping rules that are used for semantic reasoning are presented with LL inference figures. We propose a system architecture where the DAML-S translator the LL theorem prover and the semantic reasoner can operate together to fulfill the task. This architecture has been implemented in Java.
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value added web Services composition using automatic program synthesis
Lecture Notes in Computer Science, 2002Co-Authors: Mihhail Matskin, Jinghai RaoAbstract:The number of products and Services available over the Internet increases dramatically during the last years and it is already beyond the human ability to analyze and combine them efficiently. At the same time if we consider works in software engineering (and, in particular, in component-based system development) then we can find quite strong similarity in problem Description. The web Services can be treated in a way similar to software components and Service composition can be considered as problem of software synthesis and composition. Basic idea of our approach is applying the software synthesis and composition methods to value added web Services composition. We also describe some technical details within the approach, in particular, a web Service Description language and a program synthesis method.
